Self-locking device for HSK pull claw

Abstract

The utility model relates to a self-locking device for an HSK pull claw, and aims to simplify a complex structure in the prior art and improve clamping efficiency and safety. The device mainly comprises a positioning sleeve, a locking sleeve, an HSK pull claw, a pop rivet, a tensioning oil wedge, a wedge block, an oil cylinder and a sealing ring. The locking sleeve is arranged in the positioning sleeve, the HSK pull claw is inserted into the locking sleeve, the blind rivet is connected with the HSK pull claw, the tensioning oil wedge is arranged at the end, away from the locking sleeve, of the blind rivet, and the wedge block and the oil cylinder are arranged outside the tensioning oil wedge in a sleeving mode. The inclination angle of the contact face of the wedge block and the tensioning oil wedge is smaller than the self-locking angle, and the force increasing and self-locking functions are achieved. One end of the locking sleeve and the broach handle are integrally designed, the other end of the locking sleeve is provided with a positioning cone which is clamped with the HSK pull claw, and stability is enhanced. The sealing ring in the positioning sleeve ensures the sealing performance of the oil cylinder when the oil cylinder works under high pressure, and oil leakage is prevented. The device is compact in structure, easy and convenient to operate and suitable for meeting the requirement for an efficient and accurate clamping device in modern machining.

Description

TECHNICAL FIELD

[0001] The utility model provides a self locking device belongs to HSK claw technical field, especially relates to a self locking device for HSK claw. BACKGROUND

[0002] HSK claw is a kind of high-precision clamping device for connecting between machine tool spindle and tool, it ensures the stability and accuracy of tool in high-speed rotation or machining process by specific tensioning force and self-locking mechanism, usually by claw body, tensioning oil wedge, wedge block, oil cylinder and other key components, can realize quick and reliable tool clamping and release, to adapt to the demand of modern numerical control machine tool to high efficiency, accurate machining. The claw structure under prior art is usually more complex, contains multiple precision components, such as claw body, driving mechanism, clamping and release mechanism, positioning element. These components work together to realize the quick clamping and accurate positioning of tool. Claw body can include multiple claw arms, for direct contact with tool and exert clamping force. Driving mechanism is responsible for providing power, so that claw arm can open and close. Clamping and release mechanism involves the accurate control of claw arm to ensure stable clamping of tool at high speed. The structure of the self locking device of the above-mentioned HSK claw is complex, which leads to inconvenient installation and maintenance, low clamping efficiency, affects production process, insufficient clamping safety and reliability, which can lead to tool shank loosening or failure, high maintenance cost due to fast component wear and frequent replacement, poor adaptability, unable to meet the demand of different size and shape tool shank, and insufficient durability, which can lead to damage of self locking component SUMMARY

[0003] In order to make up for the deficiency of prior art, the self locking device for HSK claw is provided, which solves the problems of complex structure, low efficiency and poor safety, and achieves the goals of simplified structure, quick, safe and reliable clamping.

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme: a self locking device for HSK claw, comprising a positioning sleeve, a locking sleeve corresponding to the positioning sleeve is arranged on one side of the positioning sleeve, an HSK claw is arranged in the positioning sleeve, a tensioning pin corresponding to the HSK claw is arranged between the HSK claws, a tensioning oil wedge is arranged at the end of the tensioning pin away from the locking sleeve, and a wedge block and an oil cylinder corresponding to the tensioning oil wedge are arranged on the outside of the tensioning oil wedge.

[0005] Preferably, the oil cylinder is located on the side of the wedge block close to the tensioning oil wedge, the oil cylinder and the wedge block are in close contact, and the tensioning oil wedge and the oil cylinder correspond in shape.

[0006] Preferably, the inclination angle of the contact surface of the wedge block and the tensioning oil wedge is less than the self-locking angle.

[0007] Preferably, the locking sleeve is integrally provided with a drawbar handle at one end away from the positioning sleeve, and the other end of the locking sleeve is provided with a positioning cone corresponding to the HSK draw claw.

[0008] Preferably, the positioning sleeve and the drawbar contact surface are provided with a positioning surface, and the inside of the positioning sleeve is provided with a sealing ring corresponding to the internal structure.

[0009] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0010] The utility model discloses a positioning sleeve is inserted into the inside and cooperates with it, and the HSK draw claw is arranged in the inside of positioning sleeve, and the drawbar is arranged between the HSK draw claw, and the one end of drawbar away from the locking sleeve is connected to the tension oil wedge, and the tension oil wedge is again set with wedge and oil cylinder outside, and the structure design not only simplifies the assembly quantity and assembly complexity, and through the oil pressure drive tension oil wedge quick response oil circuit pressure change realizes quick clamping, and simultaneously utilizes the self -locking mechanism of wedge and keeps the clamping state after oil pressure release, ensures the stability and safety of clamping, effectively solves the complex structure, low efficiency, poor safety problem in prior art.

[0011] Other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional view of the utility model discloses a kind of self-locking device for HSK draw claw.

[0013] As shown in the figure:

[0014] 1, positioning sleeve; 2, locking sleeve; 3, HSK draw claw; 4, drawbar; 5, tension oil wedge; 6, wedge; 7, oil cylinder; 8, drawbar handle; 9, positioning cone; 10, positioning surface; 11, sealing ring. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0016] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] like Figure 1 As shown, a self-locking device for HSK pull claws includes a positioning sleeve 1. The positioning sleeve 1 has a locking sleeve 2 on one side that is inserted into and corresponds to itself. Inside the positioning sleeve 1, an HSK pull claw 3 is inserted into the locking sleeve 2. Between the HSK pull claws 3, a corresponding pull stud 4 is provided. A tensioning wedge 5 is provided at the end of the pull stud 4 away from the locking sleeve 2. A corresponding wedge block 6 and a hydraulic cylinder 7 are fitted around the tensioning wedge 5. The hydraulic cylinder 7 is located on the side of the wedge block 6 closest to the tensioning wedge 5. The hydraulic cylinder 7 and the wedge block 6 are in close contact, and the shapes of the tensioning wedge 5 and the hydraulic cylinder 7 correspond, ensuring that the hydraulic cylinder 7 can effectively drive the wedge block 6 to move, achieving rapid clamping.

[0019] In this embodiment, the inclination angle of the contact surface between the wedge 6 and the tensioning wedge 5 is designed to be smaller than the self-locking angle. This key feature allows the wedge 6 to generate a force-amplifying effect during clamping and maintain a self-locking state even when the cylinder 7 is pressureless, thus ensuring the stability and safety of clamping. Furthermore, one end of the locking sleeve 2 is integrated with the pull handle 8, while the other end has a positioning cone 9 that precisely engages with the HSK pull claw 3, enhancing the structural stability and operational precision of the entire device. To further improve the sealing performance and durability of the device, a sealing ring 11 is specially designed inside the positioning sleeve 1 to adapt to high-pressure working environments, prevent oil leakage, and ensure the long-term stable operation of the cylinder 7. The comprehensive application of these designs makes the HSK pull claw self-locking device of this invention more compact in structure and easier to operate, while significantly improving functionality and reliability, meeting the needs of modern machining for efficient and precise clamping devices.

[0020] like Figure 1As shown, the inclination angle of the contact surface of the wedge block 6 and the tension oil wedge 5 is less than the self-locking angle, which enables the wedge block 6 to generate a force amplification effect during clamping and keeps the self-locking state when the oil cylinder has no pressure, thereby improving the safety and reliability of clamping. The locking sleeve 2 is integrally provided with a drawbar handle 8 away from the positioning sleeve 1, and the other end of the locking sleeve 2 is provided with a positioning cone 9 corresponding to the HSK draw jaw 3, which is engaged with the HSK draw jaw 3, thereby enhancing the structural stability of the device. The contact surface of the positioning sleeve 1 and the drawbar 4 is provided with a positioning surface 10. The inside of the positioning sleeve 1 is also provided with a sealing ring 11 corresponding to the internal structure to ensure the sealing property of the oil cylinder 7 under high pressure, prevent oil leakage, and maintain the long-term stable operation of the device.

[0021] In this embodiment, the inclination angle of the contact surface of the wedge block 6 and the tension oil wedge 5 is carefully designed to achieve a force amplification effect during clamping, while ensuring that the wedge block 6 can keep the self-locking state when the oil cylinder 7 has no pressure, thereby significantly improving the safety and reliability of clamping. In addition, the design of the locking sleeve 2 not only integrates the drawbar handle 8, improving the convenience of operation, but also enhances the structural stability of the entire device through the precise cooperation of the positioning cone 9 and the HSK draw jaw 3, ensuring stable operation under high load conditions. The design of the sealing ring 11 inside the positioning sleeve 1 effectively prevents oil leakage under high pressure working environment, maintains the long-term stable operation of the oil cylinder 7, reduces maintenance costs and improves work efficiency. These innovative designs and improvements enable the HSK draw jaw self-locking device of the present utility model to achieve efficient, stable and safe clamping function on the basis of maintaining simple structure and convenient operation, meeting the strict requirements of modern mechanical processing for high-precision clamping devices.

[0022] In use, first, the tool handle is positioned and inserted into the drawbar handle 8, and then the oil cylinder 7 is started to drive the tension oil wedge 5, so that the wedge block 6 moves along the inclined surface of the tension oil wedge 5. Since the inclination angle of the contact surface of the wedge block 6 and the tension oil wedge 5 is less than the self-locking angle, the wedge block 6 generates a force amplification effect during clamping, achieving rapid and stable clamping. After clamping is completed, even if the oil cylinder 7 has no pressure, the wedge block 6 can keep the self-locking state, ensuring the safety and reliability of clamping. During the entire operation process, the integrated design of the locking sleeve 2 enables the drawbar handle 8 to be closely combined with the positioning sleeve 1, and the precise engagement of the positioning cone 9 and the HSK draw jaw 3 enhances the structural stability of the device. At the same time, the sealing ring 11 inside the positioning sleeve 1 ensures the sealing property of the oil cylinder 7 under high pressure working environment, prevents oil leakage, and maintains the long-term stable operation of the oil cylinder 7. When the tool handle needs to be released, the pressure of the oil cylinder 7 is only released, and the wedge block 6 moves reversely under the action of oil pressure, and the tension oil wedge 5 is loosened accordingly, thereby achieving safe release of the tool handle. The entire operation process is simple and fast, improves work efficiency, and meets the demand for efficient and accurate clamping devices in modern mechanical processing.

[0023] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model, anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A self-locking device for a HSK claw, comprising a positioning sleeve (1), characterized in that: One side of the positioning sleeve (1) is provided with a locking sleeve (2) inserted into the inside of the positioning sleeve (1) and corresponding to the positioning sleeve (1), the inside of the positioning sleeve (1) is provided with HSK claws (3) inserted into the inside of the locking sleeve (2), the HSK claws (3) are provided with draw bolts (4) corresponding to the HSK claws (3), the draw bolts (4) are provided with tension oil wedges (5) at the ends away from the locking sleeve (2), the outside of the tension oil wedges (5) is provided with wedge blocks (6) and oil cylinders (7) corresponding to the tension oil wedges (5).

2. A self-locking device for a HSK claw according to claim 1, characterized in that: The oil cylinder (7) is located at the side of the wedge block (6) close to the tension oil wedge (5), the oil cylinder (7) and the wedge block (6) are in close contact, and the tension oil wedge (5) and the oil cylinder (7) are in corresponding shapes.

3. A self-locking device for a HSK claw according to claim 1, characterized in that: The inclination angle of the contact surface of the wedge block (6) and the tension oil wedge (5) is less than the self-locking angle.

4. A self-locking device for a HSK claw according to claim 1, characterized in that: The end of the locking sleeve (2) away from the positioning sleeve (1) is integrally provided with a broach handle (8), the other end of the locking sleeve (2) is provided with a positioning cone (9) corresponding to the HSK claw (3), and the positioning cone (9) and the HSK claw (3) are correspondingly clamped.

5. A self-locking device for a HSK claw according to claim 1, characterized in that: The contact surface of the positioning sleeve (1) and the draw bolt (4) is provided with a positioning surface (10), and the inside of the positioning sleeve (1) is provided with a sealing ring (11) corresponding to the internal structure.

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